Dual Headed USB hookup?

I've been considering getting the Gemini Dual Headed USB Cable along with the iFiUSB Power Supply to hook into my Audiophilleo2. My question is... while I know the "power" leg of the Gemini will go into the iFiUSB power USB port, can I hook the data cable of the Gemini directly to the USB output of my SOTM USB card and turn off the USB power on the SOTM card? Or does it have to hook into the Data/Power port on the iFi Power USB and force me to use another USB cable from the SOTM card to the USB in of the iFi unit?